Using a needle and a thread, snags can be easily repaired by anyone. It's a simple repair needed for several types of shirts, cardigans, and scarves that get caught on corners. The little snags can be annoying and can result in ruining clothes by unwinding them. This repair eliminates the snags so that doesn't happen.
Flip your clothing item over or inside out to see where the needle was pushed through.
Pull the needle all the way through. You want it tight enough that you have the whole snag through, but not tight enough to start pulling through more of the clothing item.
Remember: This is is after you pushed the thread to the inside of your clothing. This pushed the snag to the inside. On the inside snag is where you're tying the new knot where it is coming through.